a {
    text-decoration: none;
}

@media screen and (max-width: 359px) {
    html {
        font-size: 21.33333333px;
    }
}

@media screen and (min-width: 360px) {
    html {
        font-size: 24px;
    }
}

@media screen and (min-width: 375px) {
    html {
        font-size: 25px;
    }
}

@media screen and (min-width: 384px) {
    html {
        font-size: 25.6px;
    }
}

@media screen and (min-width: 400px) {
    html {
        font-size: 26.66666667px;
    }
}

@media screen and (min-width: 414px) {
    html {
        font-size: 27.6px;
    }
}

@media screen and (min-width: 424px) {
    html {
        font-size: 28.26666667px;
    }
}

@media screen and (min-width: 480px) {
    html {
        font-size: 32px;
    }
}

@media screen and (min-width: 540px) {
    html {
        font-size: 36px;
    }
}

@media screen and (min-width: 720px) {
    html {
        font-size: 48px;
    }
}

@media screen and (min-width: 750px) {
    html {
        font-size: 50px;
    }
}

* {
    margin: 0;
    padding: 0;
}

body {
    min-width: 320px;
    width: 15rem;
    margin: 0 auto;
    font-family: Arial, Helvetica, sans-serif;
    background: #f2f2f2;
}

.search_content {
    width: 15rem;
    height: 1.76rem;
    position: fixed;
    background: #ffc001;
    display: flex;
    align-items: center;
}

.search_content .classify {
    width: 0.88rem;
    height: 1.4rem;
    background: url(../images/classify.png);
    background-size: 0.88rem auto;
    margin: 0 0.32rem;
}

.search_content .search {
    height: 1.32rem;
    flex: 1;
    border: none;
    outline: none;
    border-radius: 0.68rem;
    background: #fff2cc;
    font-size: 0.5rem;
    padding: 0 0.68rem;
}

.search_content .login {
    width: 1.5rem;
    line-height: 1.4rem;
    margin: 0 0.32rem;
    color: white;
    font-size: 0.5rem;
    text-align: center;
}

.banner img {
    width: 100%;
}

.ad {
    display: flex;
}

.ad a {
    flex: 1;
}

.ad a img {
    width: 100%;
}

nav {
    display: flex;
    flex-flow: wrap;
}

nav a {
    flex: 20%;
    text-align: center;
}

nav a img {
    width: 1.64rem;
    height: 1.64rem;
    margin: 10px auto 0;
    display: block;
}

nav a span {
    font-size: 0.5rem;
    color: #333;
}